Shoemaker&#39;s jack.



' ISAAC I EOLZMAR K, or. an, LOUIS, MISSOURI.

SHOEMAKERS JACK.

Specification of Letters ratent.

Patented Mar. 16, 1915.

Application filed April 24, 1913. Serial No. 763,439.

To all whom it may concern Be it known that I, Isaac HOLZMARK, a citizenof the United States, and resident of St. Louis, Missouri, have inventedcertain new and useful 1m rovements in Shoemakers Jacks, of whici thefollowing is a specification containing a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

My invention relates to improvements in shoemakers jacks, and the ob ectof my invention is to construct a jack comprising a floor stand arrangedto be fixedly secured in place and having at its upper end an upwardly 0en vertical socket, and opposite horizonta ly-alining sockets allarranged to interchangeably receive the stem of the last in such mannerthat the said stem may be rotated in any one of said sockets, and thelast may be held in any desired position.

With the above purposes in view my invention consists in certain novelfeatures of construction and arrangement of parts as will be hereinaftermore fully described, pointed out in the claim and illustrated by theaccompanying drawing, in which- Figure l is an elevation of my improvedjack showing certain of the parts in section; Fig. 2 is an elevation ofthe upper portion of the jack taken at right angles to Fig. 1; and Fig.3 is a sectional plan taken on the line 3-3 of Fig. 2.

Referring by numerals to the accom anying drawing: 5 designates thestandar having an integral base 6 which is arranged to be secured to asuitable su port.

The standard is preferab y formed hollow throughout its length and hasat its top a vertically disposed socket 7 and two horizontally aliningopenings 8 forming sockets, all of said sockets being each of likediameter throughout its length and preferably circular.

9 designates the last-shank, the body ortion of which is referablycylindrica to form a cylindricaFjournal 10 arranged to vtinterchangeably throughout its length in y of said sockets, and at itsupper end the shank is reduced in order to fit the socket of the last11, which is of ordinary construction. In order to limit the insertionof the journal 10 into said sockets there is I formed around the body ofthe shank 9 a collar 12.

Formed inte ral with the shank there are the diametricaily opposed stubs13 which are arranged to secure the free ends of an elastic coiledspring which is of suiiicient len th to extend continuously from one ofsai stubs to the other, and act as a laststrap 14.

Formed in the wall of the standard at right angles to the aliningopenings 8 there is a tapped hole 15 arranged to receive a set screw 16which rovides means for securing the last-shun against rotation.

t is to be observed that the jack is constructed of a number of parts,all of which may be readily formed by casting, that the arrangement ofsockets in the top of the standard permits of adjustment of thelast-shank reversibly and interchangeably from one socket to the other,and that the circular sockets and cylindrical journal of the last-shankprovide means whereby the last and its shank ma be rotated for anadditional range of a justment, so that all necessary positions of workmay be had.

If desired, the set screw supplies means whereby the last may be lockedin any selected position.

By the construction shown and described all working parts of a jack aredispensed with, which not only decreases the cost of producing the jackbut also increases the life in that there are no parts which may bereadily broken.

I claim:

The improved shoemakers jack, comprising a lon floor-standard having atits uper end three (3) separate sockets each of ike diameter throughoutits length; two of said sockets extending horizontally and opening onopposite sides of said standard, and the third socket extendingvertically and opening on the top of said standard and extending at aright-angle to the horizontal sockets; and a last-shank having a journalname to this specification, in presence of two which is cylindricalthroughout its length subscribing wltnesses; and arranged tointerchangeabl fit within each of said three sockets; w ereby said ISAACHOLZMARK. last-shank may project from oppcsite sides Witnesses: and topof said standard during use. E. L. WALLACE,

In testimony'whereof, I have signed my 3 JOHN C, Hacpox,

Copies of this patent may be obtained for five cents each, by addressingthe ""qemmission'er of Patents,

' Washington, D'. O."

